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canonical / lxd

Powerful system container and virtual machine manager
https://canonical.com/lxd
GNU Affero General Public License v3.0
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Feature request that LXD Profiles auto create storage volumes for addtional disks #9997

Open markrattray opened 2 years ago

markrattray commented 2 years ago

Hi

LXD 4.22 on Ubuntu Server 20.04 AMD64. I have only tested on LXD managed ZFS storage pools.

Profiles are happy to auto create the root volumes wherever. Additional disks in the profiles have to be manually created before the instance has to be created, and size restrictions are not supported on these additional disks (profile validation fails on save).

This behaviour adds complexity to automation.

In the future, please could you extend the auto creation and size limitation features to multiple additional disks stipulated in Profiles, if they don't exist. Also auto deletion on instance deletion.

More info; https://discuss.linuxcontainers.org/t/how-to-autoprovision-additional-disks-using-profiles-or-ansible-in-a-cluster/13285

Many thanks!

stgraber commented 2 years ago

The reason why the size property doesn't apply to non-root disks is because those disks can be shared with multiple instances. Instead the size property on the volume itself is used for this.

The general idea of being able to define a disk entry in a profile which would then cause a new volume to be created when an instance gets created is something we've ran into before but so far haven't found an elegant way to address.